<template>
    <div>
      <!-- 面包屑导航区域 -->
      <el-breadcrumb separator-class="el-icon-arrow-right">
        <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
        <el-breadcrumb-item>数据统计</el-breadcrumb-item>
        <el-breadcrumb-item>数据报表</el-breadcrumb-item>
      </el-breadcrumb>
  
      <!-- 卡片视图区域 -->
      <el-card>
        <div id="main" style="width: 750px;height:400px;"></div>
      </el-card>
    </div>
  </template>
  
  <script>
  // 1. 导入 echarts
  import * as echarts from 'echarts';
  import _ from 'lodash'
  
  export default {
    data() {
      return {
        options: {
          title: {
            text: '用户来源'
          },
          tooltip: {
            trigger: 'axis',
            axisPointer: {
              type: 'cross',
              label: {
                backgroundColor: '#E9EEF3'
              }
            }
          },
          grid: {
            left: '3%',
            right: '4%',
            bottom: '3%',
            containLabel: true
          },
          xAxis: [
            {
              boundaryGap: false
            }
          ],
          yAxis: [
            {
              type: 'value'
            }
          ]
        }
      }
    },
    created() {},

    //生命周期函数
    async mounted() {
      //基于准备好的dom，初始化echarts实例
      var myChart = echarts.init(document.getElementById('main'))
  
      const { data: res } = await this.$http.get('reports/type/1')
      if (res.meta.status !== 200) {
        return this.$message.error('获取折线图数据失败！')
      }
  
      // 4. 准备数据和配置项
      const result = _.merge(res.data, this.options)
  
      myChart.setOption(result)
    },
    methods: {}
  }
  </script>
  
  <style lang="less" scoped>
  </style>
  